After the nightmare, Ron is deeply affected by his jealousy and insecurity. He acts strangely around Harry and Hermione, becoming irritable and withdrawn. He tries to hide his feelings, but it's clear that he is deeply upset.
Here are some of Ron's reactions:
* He becomes irritable and snappy: Ron is short-tempered and easily annoyed, especially around Harry and Hermione.
* He avoids Harry and Hermione: He tries to stay away from them as much as possible, which only fuels his suspicions and makes him more isolated.
* He is jealous and insecure: Ron feels threatened by the possibility of Harry and Hermione developing feelings for each other.
* He acts out of character: He becomes more impulsive and makes rash decisions, like getting involved in a dangerous Triwizard Tournament task to prove himself.
It's important to note that Ron is not explicitly aware of the true nature of his feelings for Hermione. This nightmare serves as a catalyst for his growing awareness of his feelings, but he doesn't fully understand them yet. It also shows his vulnerabilities and insecurities, especially when it comes to his relationships with Harry and Hermione.
This event ultimately leads to Ron's temporary departure from the group, but also sets the stage for a more serious exploration of his feelings for Hermione as the series progresses.